Refrigeration apparatus



G. A. LEYNER ET AL REFRIGERATION APPARATUS 6 3 9 1 1 3 h C W Original Filed April 26, 1934 INVENTORS GEORGE A. Lawn-:2 HNTHONY H. KELLY WITNESSES:

BY ATTO EY Patented Mar. 31, 1936 REFRIGERATION APPARATUS George A. Leyner and Anthony H. Kelly, Spring- Mass., assignors to Westinghouse Elec- & Manufacturing Company, East Pittsburgh, Pa., a. corporation of Pennsylvania Application April 26, 1934, Serial No. 722,414 Renewed September 6, 1935 6 Claims.

Our invention relates to refrigeration apparams and particularly to the cooling element associatedwith mechanical refrigeration apparatus.

It is an object'of our invention to provide an improved evaporator or cooling element construction wherein the return of only saturated or I superheated refrigerant vapor and lubricant to the compressor is ensured.

I It is a further object of'our invention to provide' an improved evaporator and baflle means therein. 7 1

It is another object of our invention to cons'truct an evaporator suitable for use with a refrigerant and lubricant'which mix in large proportions to form a substantially homogeneous mixture and which evaporator construction ensures return of only saturated or superheated gas and lubricant.

The refrigerant and lubricant in the evaporator, whether it forms a homogeneous mixture or not, is hereinafter termed working fluid.

These and other objects are effected by our invention, as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part of this application, in which:

Fig. 1 is a view of a refrigerating system including an evaporator with parts thereof broken away to show two embodiments of my improved baffle means;

Fig. 2 is a detail front view of the baflle means shown in the left-hand header of the evaporator shown in Fig. 1 and,

Fig. 3 is a detail front view of the baffle means shownin the right-hand header of the evaporator shown in Fig. 1.

Referring specifically to the drawing for a detailed description of our invention, numeral I designates a hermetically-sealed, refrigerant and lubricant containing motor-compressor unit which is preferably adaptedto operate with a refrigerant and liquid which mix in substantially all proportions of substantially the range of pressures and temperatures encountered in the refrigerating system. The motor-compressor unit I withdraws working fluid through conduit 2 from an evaporator 3, and, after compressing it, forces the working fluid to a condenser 4 wherein the high pressure vapor is cooled by a fan 5, thereby condensing the working fluid. Condensed working fluid is then conveyed to a distributing device 6, such as, for example, a float valve, and from thence is conveyed to the evaporator 3 through an inlet conduit 1.

The evaporator 3 is preferably of the U-shaped corrugated sheet metal type having a header 8 at one upper extremity of I the U formation, a header 9 at the other end of the U-formation. Apertures 8a and 9a are formed in headers B and 9, respectively, and a cross header ll con- 5 nects the apertures 8a and 9a. The suction conduit 2 is connected in the cross header II. The inlet conduit 1 preferably enters one of the headers and extends through a corrugation to the bottom of the evaporator 3 as fully described 10 and claimed in the copending application of Jens Touborg, filed May 15, 1934, Serial No. 725,723, for Refrigeration apparatus and method of manufacture, and assigned to the assignee of the present application.

The level of working fluid in the evaporator 3 is shown in Fig. 1 and is preferably'below the level of the openings 8a and 9a. 'Bafiles I2 and I3 are preferably welded into the cross header II as shown in Fig. 1. When the working fluid in evaporator 3 is vaporized due to the heat from the refrigerator box and the low suction pressure prevailing in the evaporator 3, the baffles prevent the withdrawal' of liquid working fluid through the cross header I l and suction outlet conduit 2 because any liquid contained in the vapor impinges upon the baflie and drops back into the liquid working fluid below the headers 8 and 9. If liquid working fluid is withdrawn,

its refrigerating effect is lost for cooling the evaporator 3 and inefiicient operation of the refrigerating system results. Only saturated or superheated vapor, containing small quantities of lubricant, is therefore withdrawn from the evaporator 3.

The bafiles l2 and I3 are shown as of difierent construction, but it is obvious that baffles of the same construction are preferably used in the evaporator 3. Baflie I2 is formed of a sheet metal disc M having upwardly extending louvers l5 formed therein. Baffle I3 is likewise formed of a sheet metal disc l6 having slots I1 formed therein.

From the foregoing, it will be apparent that we have provided an improved evaporator and baffle construction which ensures the return of only saturated or superheated vapor and lubricant to the compressor and which is adaptable for use in a refrigerating system utilizing a refrigerant and lubricant which form a. substan- 5O tially homogeneous mechanically inseparable mixture, as well as in a system utilizing a refrigerant and lubricant which stratify.

While we have shown our invention in two forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications. without departing from the spirit thereof, and we desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What we claim is:

1. An evaporator for a mechanical refrigeratworking fluid in the side walls, said baflies being formed of members having louvers therein.

4- An evaporator for a mechanical refrigerating system comprising two vertically-extending working fluid containing side walls, headers formed at the upper ends the side walls, a cross-header connecting the upper side wall header and having working fluid outlet means therein and a plurality of ballies disposed adjacent the ing system comprising two vertically-extending cross-header between the outlet, means and the 10 working fluid containing side walls, headers working fluid in the e Walls, Sa d DB-fl s beformed at the upper ends of the side walls, a iflg formed 0 members having p y cross-header connecting the side wall headers tending ers the ein. and having working fluid outlet means therein An evaporator a fli 5 and baille means disposed in the cross-header i system comprising O Vertically extending 5 between the outlet means and the working fluid Working fl d containing i w ll h aders in t d ll formed at the upper ends of the side walls, a

2, A e po ato f a mechani al refrigergtcross-header connecting the side wall headers ing system comprising two vertically extending and fl- Working fluid Outlet ans therein working fluid containing side walls, headers and a p li y 01' ballles disposed adjacent the 20 f rmed t the upper ends f the side walls and cross-header between the outlet means and the having openings therein, a, erossmeader Working fluid in the side walls, said baifles being necting the side wall header openings'and havformed of members having slots therein mg working fluid outlet means therein, and 6. An evaporator for a mechanical refrigeratbailie means disposed in the cross-header bemg system two Vertically extending tween the outlet means and the working fiuid working fluid containing side walls headers in the side walls formed at the upper ends of the side walls, a

cross-header connecting the side wall headers An evaporatqr for mecharfica-l and having working fluid outlet means therein ns y m comprising w vvertloally-exteni111s and a plurality of bailies disposedadjacent the 30 working fluid containing Side a headers cross-header between the outlet means and the f rm at the pp ends f h side walls, a working fluid in the side walls, said bailles becross-header connecting the side wall headers ing formed of members having restricted openand having working fluid outlet means therein ings therein. v

and a plurality oi. baflles disposed adjacent the GEORGE A, mm, 35

the above ,numbered patent requiring correction as follows:

cross-header between the outlet means and the ANTHONY H. KELLY.

CERTIFICATE or CORRECTION.

Patent No. 2,035, 710

March 31 1936.

GEORGEA. LEYNER, ET AL.

It is hereby certified that errorappe'ars in the printed specification of Page 2 second column, line 8, claim 4, for the syllable "er" read are; and that the said Letters Patent should be read with this correction therein that conform to the record of the case in the Patent Office. I

Signed and sealed this 28th day April, A. n. 193

the same may Leslie Frazer (Seal) Acting Commissioner of Patents.

art that it is not so limited, but is susceptible of various other changes and modifications. without departing from the spirit thereof, and we desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What we claim is:

1. An evaporator for a mechanical refrigeratworking fluid in the side walls, said baflies being formed of members having louvers therein.

4- An evaporator for a mechanical refrigerating system comprising two vertically-extending working fluid containing side walls, headers formed at the upper ends the side walls, a cross-header connecting the upper side wall header and having working fluid outlet means therein and a plurality of ballies disposed adjacent the ing system comprising two vertically-extending cross-header between the outlet, means and the 10 working fluid containing side walls, headers working fluid in the e Walls, Sa d DB-fl s beformed at the upper ends of the side walls, a iflg formed 0 members having p y cross-header connecting the side wall headers tending ers the ein. and having working fluid outlet means therein An evaporator a fli 5 and baille means disposed in the cross-header i system comprising O Vertically extending 5 between the outlet means and the working fluid Working fl d containing i w ll h aders in t d ll formed at the upper ends of the side walls, a

2, A e po ato f a mechani al refrigergtcross-header connecting the side wall headers ing system comprising two vertically extending and fl- Working fluid Outlet ans therein working fluid containing side walls, headers and a p li y 01' ballles disposed adjacent the 20 f rmed t the upper ends f the side walls and cross-header between the outlet means and the having openings therein, a, erossmeader Working fluid in the side walls, said baifles being necting the side wall header openings'and havformed of members having slots therein mg working fluid outlet means therein, and 6. An evaporator for a mechanical refrigeratbailie means disposed in the cross-header bemg system two Vertically extending tween the outlet means and the working fiuid working fluid containing side walls headers in the side walls formed at the upper ends of the side walls, a

cross-header connecting the side wall headers An evaporatqr for mecharfica-l and having working fluid outlet means therein ns y m comprising w vvertloally-exteni111s and a plurality of bailies disposedadjacent the 30 working fluid containing Side a headers cross-header between the outlet means and the f rm at the pp ends f h side walls, a working fluid in the side walls, said bailles becross-header connecting the side wall headers ing formed of members having restricted openand having working fluid outlet means therein ings therein. v

and a plurality oi. baflles disposed adjacent the GEORGE A, mm, 35

the above ,numbered patent requiring correction as follows:

cross-header between the outlet means and the ANTHONY H. KELLY.

CERTIFICATE or CORRECTION.

Patent No. 2,035, 710

March 31 1936.

GEORGEA. LEYNER, ET AL.

It is hereby certified that errorappe'ars in the printed specification of Page 2 second column, line 8, claim 4, for the syllable "er" read are; and that the said Letters Patent should be read with this correction therein that conform to the record of the case in the Patent Office. I

Signed and sealed this 28th day April, A. n. 193

the same may Leslie Frazer (Seal) Acting Commissioner of Patents. 

